Isn't it really dangerous to build stuff from only one substance considering resonant frequenties?

The Parthenon would be standing to this day if it weren’t for invaders.The Eiffel Tower -all steel.Castles of the world being made of stone still standing to this day.
It seems different materials don’t matter.
As for Tesla’s machine,no.Someone would have that by now and would be knocking down buildings.

@lucillelucillelucille How do you know they aren’t? It would end up pretty easily tracable and the governments might keep it secret considering how easy it is… Conspiracy theory formulated. Eiffel Tower is pretty well guarded (or surrounded at least) and the concept for an earthquake machine is pretty sound.

When you design a structure or piece of hardware you make sure its resonant frequency is well above or below its operating point. The Tacoma Narrows Bridge used several types of material and was a suspension bridge but the resonant frequency was close to the frequency of the wind disturbance. It is one of the best documented cases of resonance destroying a structure. We have learned a lot since then.

@Zyx-I never said the concept wasn’t sound—pun intended—;)

@worriedguy GA

IMO a lot is pure luck as many ancient buildings still standing never were exposed to large scale earthquakes. Modern buildings have incredible engineered shock absorbers built into their foundations that literally isolate the skyscrapers from the ground and very highly engineered reinforced composite components of the structure itself can help buildings withstand all but the worst earthquakes. The The ICC International Code Council governs all building codes related to constucting Earthquake resistance construction….you have to be a member with deep pockets to get access to these codes.

What is really devastating many ancient and new buildings today is acid rain.

I don’t know if you guys have seen this or not, but the Mythbusters made and tested a Tesla earthquake machine. I think they were a bit too hasty to declare the myth busted, but it’s an interesting episode.

@gorillapaws Yeah I actually saw that and I too thought they weren’t very thorough, but then they never really are.